I've heard to sailings in P.V that are roundtrip, but they are sailings on private small & large yachts. Haven't heard of anything commercial (cruise lines) offering round trips sailings from and to P.V.

The Mexican Rivera is suffering from a lack of tourist because of the violence in some parts of Mexico. This is a fact...so I would be very careful of any NON-commerical (offers not coming from the larger well known cruise lines) cruises being offered, no matter how great they sound.